It seems you don't understand the concept of a theory as used by scientists. Do not confuse it with the colloquial use of the word theory, which means "hypothesis" or "conjecture." In science, a theory is not a hypothesis or conjecture; it is a well-substantiated abstraction intended to represent the reality of the particular scientific phenomenon in question. Theory in science is as opposed to empiricism, which is observing the actual phenomenon as opposed to its abstraction.
An analogy would be learning to play the guitar. When you start out learning the techniques and how to read music, you are learning guitar theory. This is as opposed to actually playing the guitar, which would be analogous to empiricism (theory vs. practice). Theory in this case does not mean "guess," because you are not "guessing" how to play the guitar.
Evolution has been proven wrong? By who? Michael Behe and his ridiculous notion of "irreducible complexity," which is basically "intelligent design" in another guise? And Big Bang is not a blind guess. I am not aware of any other theory out there that does a better job of explaining an expanding universe, cosmic microwave background, isotropy and the numerous other things Big Bang explains.
Religion is not science, if that's what you were getting at. I'm sure you can learn this stuff at Bob Jones University, but there's a reason why it's not an accredited institution.
OMG A CREATOR!!!1 U R TEH CREATIONIST!!!1 You seem to be unaware of the logical fallacy of petitio principii. If you assume the universe was created, then you have already presupposed the existence of a creator. You are using a circular argument for creationism.